+1 W/ geargrinder. You took away my vote before it was even cast. Did you have a bad experience with Harris?

Here's why I make my own:

The springs ring when you shoot which bugs me.

I'm uncomfortable about being consistent with the required preloading being consistent under field conditions.

They are never at the correct height and difficult to level. The lock is just one more mechanical thing to reach for.

When shooting at steep angles, especially up hill, it'll fold up with a heavy rifle if you pull your shoulder off to reach for something or shift around getting into position.

I make my own solid aluminum with leg length generally determined by "average" shooting conditions. The option of using different length, easy to pack, extensions allow for very steep up hill shooting from level ground or to get above grass.

If the bubble isn't level when I set up, I grab the pistol grip and twist the rifle onto the high leg and slide the whole rig back and forth cutting a grove in the dirt until the bubble is level.

As the legs are fixed I rigged another way to mount the carry sling which turns out to me more comfortable and serviceable than slinging the rifle over the shoulder.

Both are prototypes and are a bit rough machining wise but function as intended.

Note the flush mount on the rear and typical sling stud on the bipod. There are one on each side of the bipod with a "Y" on that end of the sling. The Sling has the flush mount swivel on the rear and is quickly removed if necessary for shooting. I carry the thing like an M-60. The scene seems to be a bit intimidating to those I meet on the trail.

Original version:

Next version on carry gun: A little taller as there isn't as much time to mow grass when doing the walk and stalk thing.